Hydraulically operated continuously variable transmission

Details Hydraulically operated continuously variable transmission Hydraulically operated continuously variable transmission

1987-12-14

1990-01-09

Look, Edward K.

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

60487, 60488, F16D 3900

Patent

active

048919446

ABSTRACT:
A hydraulically operated continuously variable transmission comprises a hydraulic motor coupled to an output shaft, a hydraulic pump coupled an input shaft, and a closed hydraulic circuit interconnecting the hydraulic motor and the hydraulic pump. The hydraulic motor has an annular array of slidable motor plungers disposed around an axis of rotation thereof and slidably disposed in respective cylinder holes defined in the motor cylinder. The hydraulic motor also has a distribution ring supported on the fixed shaft and rotatable relatively to and slidable against an end face of the motor cylinder for introducing high-pressure oil successively into the cylinder holes and discharging oil successively from the cylinder holes in response to rotation of the motor cylinder. The transmission also includes a hydraulic pump coupled to an input shaft, at least one of the hydraulic pump and the hydraulic motor being of the variable-displacement type, and a closed hydraulic circuit interconnecting the hydraulic pump and the hydraulic motor. The distribution ring is held in engagement with the fixed shaft for preventing the distribution ring from rotating with respect to the fixed shaft.

REFERENCES:
patent: 2777286 (1957-01-01), Badalini
patent: 3364679 (1968-01-01), Osojnak
patent: 3364680 (1968-01-01), Osojnak
patent: 3416312 (1968-12-01), Margolin
patent: 3464206 (1969-09-01), Badalini
patent: 3890883 (1975-06-01), Rometsch et al.
patent: 4444093 (1984-04-01), Koga
patent: 4478134 (1984-10-01), Kawahara et al.
patent: 4550645 (1985-11-01), Beck
patent: 4646520 (1987-03-01), Furumoto

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